ownCloud TypeError: u is null editor.ts:28

[taich001]

I tried to use files_markdown with owncloud and run into an error.

When creating a public link my mouse gets stuck and in debugger I see

TypeError: u is null editor.ts:28
    <anonym> editor.ts:28
    Webpack 3
        o
        <anonym>
        <anonym>

Dows anyone know how to fix this?